Automation System
A disadvantage of Numerical Control (NC) is:

one operator is needed for each machine.
the computer is not reliable
the tape and tape reader are not reliable
None of these
the machine tool can easily overheat

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Automation System
The use of specialized workstations:

reduces the host computer workload and allows more users
has a high cost-performance tradeoff
reduces the host computer workload
provides limited growth potentials for 3-D
None of these

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Automation System
Straight-line operations:

must be parallel to one of the axes of the coordinate system
None of these
can include diagonal cuts if they aren't curved
must be limited to two per workpiece
All of these

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